This the Smartthings forum, and not Schneider’s support forum if there is any. But to get this information, you need to look into your Wiser app and look for some settings there. Otherwise, you can contact Wiser support, but they are not really helpful.
If you use a SmartThings hub for your Wiser devices, you can check the Zigbee channel from the IDE, under the Hub.
What you need to know about Zigbee vs Wifi channels: